The world's largest single-aperture telescope resides in the Canary Islands.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

A statue commemorating the island's tradition of dancing dwarves in Napoleon hats.

This replica of Columbus's famous ship houses the history of La Palma's maritime importance during the Age of Exploration.

These wooden balconies that are both decorative and functional.

An underground city of salt.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

360° views of the city plus five floors of optical illusions and hands-on science.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Protecting the dead from opportunistic body snatchers.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

These sculptures of various animals adorn the building that houses one of the capital's least known museums.

One of the last doorless, continuously moving elevators still in use in the U.K.

The last fully working Victorian Turkish bath in England.

A failed infrastructure project now owns this unique moniker.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A magnificent, iconic stone tower in the Scottish Highlands.

Spend the night in this formerly abandoned traditional Scottish village.

A whale's jawbone and a malfunctioning harpoon welcome you to the village of Bragar and its lore.